P0336

P0336
Crankshaft Position Sensor - Range/Performance
Crankshaft Position Sensor - not in specified range





Function
To precisely determine the crankshaft position, a Crankshaft Position (CKP) Sensor is needed.

Engine speed and crankshaft position is monitored via an inductive sensor. A larger gear notch in the ring gear serves as reference mark. Through the larger notch, a higher voltage is induced in the sensor.

A soft iron core partially bundles the magnetic field produced by the permanent magnet which then enters the space and closes again through the magnetically conductive parts of the engine. A ring gear moving past the face of the sensor affects the magnetic field. The change in the magnetic filed induces an electric charge that is used by the ECM.

Diagnostics conditions
A DTC is stored in memory when no Crankshaft Position (CKP) Sensor signal is recognized within 200 crankshaft revolutions and when the engine speed is above 500 1/min.





Wiring Diagram.

NOTE: A missing CKP sensor signal is not recognized when starting the engine and is therefore not stored. This will lead to an ECM reset.





Diagnostic procedure
Check signal with engine tester.
1. Connect engine tester with adapter cable. Use special connection (ground cable to pin 2).
2. Start engine or crank engine with starter motor.




Oscilloscope must show sinus curves of at least 3V (engine speed signal) and one inserted higher amplitude (CKP Sensor signal).

Check gap for CKP Sensor, adjust as necessary. The gap between CKP Sensor and ring gear must he 1.0 ± 0.2 mm..





Adjustment with engine removed.
1. Loosen bolts on bracket.
2. Using a feeler gauge, adjust gap of 1.0 ± 0.2 mm between ring gear and CKP Sensor.

Adjustment with engine installed.
1. Remove axle shaft at transmission flange and secure on side panel. Use suitable rags to prevent damage.
2. Remove air intake for clutch cooling.
3. Remove rubber seal between transmission housing and CKP Sensor.





4. If available, use a faulty CKP Sensor as adjustment tool. For the air gap, glue a washer of 1.0 mm thickness to the faulty CKP Sensor with quick-set glue. If you are careful you can also use the installed sensor if you use a glue that can be easily removed.





5. Install the extended CKP Sensor in the bracket and tighten.
6. Bring bracket with the extended CKP Sensor into contact with the ring gear and tighten bracket.
7. Remove extended CKP Sensor.

NOTE: If you used the original CKP Sensor, carefully remove the washer and clean off glue residue.

8. Install CKP Sensor again. Tightening torque: 8 Nm.